Calculating-machine.



H. KUENTZLER.

CALCULATING MACHINE.

APPLICATION mum APR.27,1908.

Patented Oct. 19, 1909.

4 SHEETS-SHEET 1.

H. KUENTZLER.

UALCULATIN G MAGHINE.

APPLICATION FILED APR.27,1908.

Patented Oct. 19, 1909.

4 SHEETS-SHEET 2.

H. 'KUENTZLLR. CALCULATING MACHINE.

APPLICATION FILED APR. 27,1908.

Patented Oct. 19, 1909.

- 4 BEEETB-SHEET 3.

H. KUENTZLER. CALCULATING MACHINE. APPLICATION FILED Ai R.27,1908.

Patented Oct. 19

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HENRY KUENTZLER, 0F KINGSTON, PENNSYLVANIA, ASSIGNOR TO THE ADDER MACHINE COMPANY, OF KINGSTON, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

CALCULATING-MACHINE.

Patented Oct. 19, 1909..

Application filed April 27, 1908. Serial No. 429,416.

To all whom it my concern:

. Be it known that I, HEN RY KUENTZLER, a citizen of the United States, and a resident of Kingston, in the county of Luzerne and State'of Pennsylvania, have invented cer tain new and useful Improvements .in Calculating-Machines, of .which the following isa specification.

My invention relates to adding machines and more particularly to the mechanism de signed to prevent overrotation of the parts under rapid operation during accumulation. Machines of this class have reached a high state of perfection andthey are usually reliable and accurate. Recently, motors have been attached to these machines for the purpose of increasing the frequency of their operation and their speed. Under conditions of high speed the numeral wheels are apt to be carried by their momentum beyond their proper positions and it is the purpose of my present invention to provide means whereby such overrotation is prevented during accumulation and the wheels are kept in their proper relative position at the right time even when moving with relatively great rapidity.

The machine in which my invention is embodied is that of the lVales type which is described in Letters Patent of the United States, No. 797,032, issued Aug. 15, 1905, and reference is made to that patent for an understanding of the general construction and mode of operationof the parts. The means employed to prevent overrotation of the numeral wheels in carrying is described in Letters Patent of the United States to' Charles N. McFarland No. 880,157, issued Feb. 25, 1908, and reference is made to that patent for a full understanding of the particular means employedfor that purpose.

In the last mentioned Patent No. 880,157 a. mechanism is described for preventing overrotation during accumulation, but in prac-. tice this has not proven to be as eflicient or desirable as it was thought to be when this patent was applied for, and the subject matter of the present invention is a modification of and improvement upon the means for this purpose described and disclosed in that patent.

In the drawings, Figure ,1 is a side elevation of a portion of an adding machine embodying my invention, the parts being shown in the positions which they occupy when the of the parts when the main shaft is at the end of its rearward stroke, and the operation of accumulation is being finished and the overrotation lock is engaged with its numeral wheel to perform its stated function, and Fig. 4 is a similar view showing the positions of the parts after accumulation has taken place and while the carrying operation is being performed.

It will be understood that the machine comprises a series of numeral wheels, one for each denomination, mounted upon a common shaft-adapted to rotate in suitable hearings in a framework or support capable of vertical movement so that the entire series of wheels may be moved together to and from the plane in which they separately engage with individual rack bars adapted to engage with pinions with which thenumeral wheels are provided whereby the horizontal reciprocation of the rack bars occasions the rotation of their respective numeral wheels. The machine is provided with a key board having keys arranged in denominational series "and by'the depression of which stops are interposed in the paths of the rack bars so that the latter in the actuation of the machine are moved to distances corresponding to the keys which have been depressed in the operation of enumerating an item.

Each numeral wheel, except the one of highest denomination, is provided with a carrying lever and its carryin'g pawl,- by means of which, when a number is accumulated on the wheel higher than ten, the teen is automatically carried to the wheel of next higher order after the operation of accumulation on thewheel of lower order has taken place.

It will also be understood that this form of machine is a key-set machine as conthat the numbers are first enumerated'on the key board, then the main shaft is oscillated to position the racks in accordance with the numeral keys which have been depressed. The numeral wheel shaft is then lowered to permit the engagement of the pinions on the trasted with key-operated machine and numeral wheels with their respective racks and the wheels are rotated to an extent corresponding to the keys which have been depressed. As soon as this operation of accumulation takes place the carrying opera tion takes place and is automatically performed while the main shaft is being moved to the end of its rearward stroke and a new forward stroke is commenced.

In the drawings, 100 is the main shaft of the machine adapted to oscillate in suitable bearings in the frame 1 and actuated by a manually operated handle (not shown) or in any other suitable manner.

150 is a segment lever having a leg 151 carrying a roller 152 which runs in a slot 153 of a cam lever 154 which is pivoted at its upper "end on a rock shaft 155 arranged across the machine. By suitable mechanism, which is omitted from this descrlption for the sake of clearness, but which is fully set forth in the Letters Patent above referred to,

the movement of this lever 154 is communicated to the rack bars 160, one for each numeral wheel, which are each pivoted upon oscillating arms 159 and 161 mounted upon shafts 222 and 222 arranged across the machine.

102 is one of a pair of links arranged on each side of the machine, one of which is.

hinged-to the segment lever 150 and the other of which is hinged to an oscillating crank (not shown) on the other side of the machine. At their opposite extremities these links are hinged to a cross rod 220 carrying at each of its extremities a roller 223 each adapted to operate against the upper surface of a air of swinging arms 205; each having a hub 204 mounted to swing upon a cross rod or shaft 203 which is in turn mounted on uprights 202 projecting upwardly from the frame 1 of the machine. Each arm 205 has an ear 207 and between the two ears there is supported a cross rod 208 adapted to reciprocate in slots 209 in links 210, one for each denomination, each. of which is secured by a pivot 211 to a carrying plate or lever 200, all of which swing on a common shaft 230. Each plate 200 is provided with a pivot 233 to which is secured an upwardly extending carrying pawl 234 adapted to enga e teeth on the numeral wheels presently to lie described.

Each carrying plate 200 is provided with a flange or catch 231 offset to the right in each instance to coiiperate with a latch roll 201 mounted upon a latch arm 237 adapted to oscillate upon a common shaft 238 arranged across the machine. Each carrying plate is retracted to position after movement by a spring 235. At one end of the carrying plate 200 and adjacent to the carrying pawl 234 is a projection 236 serving as a stop to prevent overrotation of the numeral wheel in carrying. A spring 238, serves to retract each latch arm 237 to position after move-,

ment and each latch arm is provided with a. tip 240 adapted to be moved by a cam 241 mounted on its numeral wheel in the manner presently to be described.

The numeral wheels 164 are arranged across the machine in denominational series. Each wheel is provided with a toothed disk 165 and a pinion 163, which latter is adapted to engage with the teeth of the racks 162 and which racks are reciprocated from the main shaft as before described.

The numeral wheels are mounted on a common shaft 32-which is supported in an oscillating frame 300 adapted to swing upon pivots 301 secured to the side frame of the machine. Depending from the shaft are two legs 320, one on each side of the machine, each provided at its lower end with a foot 321, and a short distance above its lower end with a pivot 322 on which is mounted a slotted link 323 adapted to engage the cross rod 220. The legs 320 normally rest on a recessed support 324 mounted on the frame of the machine.

Links 310 are pivoted to the extremities of the frame 300 and are each provided with slots 311 adapted to engage with the cross rod 220. Springs 298 serve to retract the legs 320 to position after movement and springs 299 serve a similar duty'for the links 310. A spring 206 is adapted to place a yielding tension upon each swinging arm 205.

Pivoted above and one adjacent to each numeral wheel' and mounted upon a common shaft .180 are a series of arms 181, each provided with roller 182 adapted to engage with the teeth of a disk 165 to insure that the numeral wheels shall be accurately placed in their proper positions after movement. Light springs 183 serve to hold each of these arms in position with its roller between the teeth of one of the toothed disks 165.

Secured to the rock shaft 155 and moving with it is a series of lock arms 190, each provided with a tip 191, adapted, when moved to proper position, to engage the teeth on the disk 165. The purpose of these lock arms is to prevent overrotation of the numeral wheels during accumulation. To that end they are brought into the path of the teeth on the disk 165 just at that movement in the operation of the machine when overrotation of. the numeral wheels is apt to occur, but at all other times are kept away from said path and out of z i engaging position with the teeth on the tisk 165. i In the operation of the machine the parts are normally in the positions shown in Fig.1. When the main shaft 100 is oscillated the leg 151 is moved upward and its roller 152 moves along the slot 153 of the lever 154 and acting against this lever serves to rock the shaft 155 until the lock arms 190 are in their ear/324a extreme forward positions. At the same time, supposing an item to have been enumerated upon the key board, the rack bars 160 will be moved to their extreme forward positions corresponding to the keys which have been depressed. Also, at the same time the links 102 on each side of the machine will have been oscillated and the cross rod 220 will have been moved and its rollers 223 acting against the upper surface of the arms 205 will have moved the cross rod 208 in the links 209 to depress the latter and thus oscil-' late the several carrying levers 200 against the tension of their retracting springs 235 bringing their catches 231 above the latch rollers 201 of the latch arms 237. Also at the same time the cross rod 220, moving in the slot of the links 323, will have swung the legs 320 off of the supports 32 1 and moved the links 310 to their extreme forward positions so that the frame 300 will have been swung downward bringing the shaft 32 of the numeral wheel system down ward, so that the pinions 163 of the numeral wheels 164 will engage with the racks 162 of the rack bars 160. The parts will then be in the positions shown in Fig.

brought into the paths of the teeth of the disk 165 just at the moment when the last tooth of the numeral wheel pinion is engaging its rack 162, it being at that moment when the momentum of the numeral wheel is apt'to cause overrotation. In the meantime, it will be noticed that the return movemerit of the rod 220 has had no effect upon the links 310, because ofthe fact that the rod slips along the slots of the link 223, but toward the end of the rearward stroke of the handle or rearward oscillationof the main shaft, this rod 220 has a lifting effect upon the link 310 and the legs 320 and lifts the latter upward so that just at the'end of the rearward stroke of the handle the legs 320 are again-brought into engagement with the support 324 and the frame 300 and shaft 32 is moved upwardly so that the. numeral wheel pinions are no longer in,engagement with their respective racks. If, in the oper. ation of accumulation, any one of the numeralwheels has -been brought past the ninth tooth so that a ten should be carried to the wheel of next higher order, a carrying operation will then take place, and this 0peration occurs just after the moment when the numeral wheels have been raised by the movement of the shaft 32 to disengage them from their respective racks.

In the carrying operation, the cam-24:1 upon each numeral wheel, and which moves with it, is brought into contact with the tip 210 of the latch arm 237 and moves the latter forward, swinging'it upon its shaft 238.. This disengages the latch roll 201 from the catch 231 of the carrying plate 200 and per mits the latter to be oscillated under the influence of its spring235. As such oscillation occurs the pawl 23 1 engages with the teeth on the disk 165 and moves this disk forward a space equal to one tooth, the projection 2336 serving to prevent overrotation during the carrying operation-4t being so arranged that if such overrotation occurs.

this projection will engage one of the teeth on the disk 165 in alower position than that tooth which has been engaged by the pawl 234.

a As the lock arms 190 are rigidly secured to the rock shaft 155 it is obvious that their tips 191 cannot be moved upward beyond the positions shown in Fig. 3. Consequently when the numeral wheels are elevated by the upward movement of the numeral wheel shaft 32, the teeth on the disk 165 are moved away from the lockarms 190 and are out of reach of the tips of these look arms during the carrying operation. 1

Any further forward movement of the main shaft will, through the cross rod 208, pull down the. carrying lever 200 by means of the links 210 and reset the carrying lever for another operation.

What I claim as new is v l. The combination with a numeral'wheel and its actuat-ingrack,'of means for moving the wheel bodily away from the rack, a lock arm adapted to engage the wheel, and means for positively actuating the lock arm into such engagement just as the wheel s disengaged from the rack by its bodily removal therefrom, and for positively removing the arm from engagement.

2. The combination with a numeral wheel and its actuating rack, of means for moving the wheel bodily away from the rack, a carrying pawl, cooperating teeth on the wheel, a lock arm adapted to engage the teeth and means for positively moving the arm into the path of the teeth and positively retaining it in position while the wheel is bodily moved therefrom. j

3. In a machine of the character described,

a vibratory shaft,'a rock shaft intermediate mechanism for moving the rock shaftpa numeral wheel, an actuat ng rack therefor,

means for moving the wheel into and out of engagement with its rack, and a lock arm' secured to the rock shaft and moved thereby into engagement with the wheel justprior t0 the disengagement of the wheel from its actuating rack.

4. The combination with a numeral wheel and its pinion of an actuating rack therefor, a carrying device, actuating mechanism therefor and a lock arm normally away from the wheel but adapted to arrest it after it has; been actuated by the rack, the lock arm moving into position before the carrying device is moved.

5. The combination of a numeralwheel andits pinion of an actuating rack, a carrying device, a lock arm for engaging the wheel just after it has been actuated by its rack, means for actuating the lock arm positively in both directions and means for actuating the carrying device separately from the arm and after it.

6. The combination of a numeral wheel and its pinion, of an actuating rack. a carrying device, a lock arm for preventing overrotation of the wheel under the impulse of the rack, means for moving the arm into a locking position and means for moving the wheel away from the arm after it has been moved to such locking position.

7. The combination of a numeral wheel and its pinion, of anactuating rack, a carry ing device, a lock arm for preventing over- "rotation of, the wheel under the impulse of the rack, means for moving the arm into a locking position and means for moving the wheel away from the arm after it has been moved to such locking position, in combination with means for retracting the arm after the wheel has been moved away therefrom.

8. In a machine of the character described, comprising a main shaft, a series of numeral wheels provided with pinion's and actuating racks therefor, and a series of carrying levers, one for each wheel, a carrying pawl mounted in each lever and a locking arm for each wheel adapted to prevent overrotation thereof under the impulse of its rack mounted upon a rock shaft and actuated from the main shaft.

9. In a machine of the character described, comprising a main shaft, a series of numeral wheels provided with pinions and actuating rack'stherefor, and a series of carrying Ievers, one for each wheel, a carrying pawl mounted in each lever and a locking arm for each wheel adapted to prevent ,overrotation thereof under the impulse of its rack mounted upon a rock shaft, a member for actuating the locking arm, and an independent member for imparting motion to the carrying lever.

10. In a machine of the character de scribed, comprising a main shaft, numeral wheels provided with pinions, actuating racks therefor, carrying levers, each provided with a carrying pawl and a series of locking arms adapted to prevent overrotation of the numeral wheels under the impulse of their respective racks, of means for from the main shaft of the machine.

11. A carrying lever, a numeral wheel, and an actuating rack therefor, in combination with a lock arm serving to prevent overrotation of the wheel under the impulse of the rack and means whereby the .wheel is kept normally unlocked, the lock arm being positively actuated in both directions and re maining at rest while the wheel is in motion during the carrying operation.

12. A-numeral wheel and its rack in combination with a lock arm serving to prevent overrotation of the wheel under the impulse of its rack, and to normally leave the wheel unlocked, carrying device mechanism actuated after the rack has operated, and means for actuating the lock arm and releasing it just prior to the carrying operation.

13. A numeral wheel and its actuating rack and carrying mechanism actuated after the rack has operated, in combination with a lock arm serving to prevent overrotation of the wheel under the impulse of its rack and to leave the wheel normally unlocked, such lock arm being at rest during the carrying operation and means for holding 'it during such operation. I

14. The combination with the carrying mechanism, a numeral wheel and its actuating rack, of a lock arm which is at rest during the carrying operation and means other than the numeral wheel actuating rack for controlling the lock arm.

15. The combination with the main shaft, the carrying mechanism, a numeral wheel and its actuating rack, of a lock arm which is at rest during the carrying operation and means whereby the lock arm is controlled directly from the main shaft of the machine.

16. The combination with a numeral wheel and its actuating rack, of a carrying lever having a rising motion, a rock shaft, an arm for locking the wheel supported on the rock-shaft separably from the carrying lever and means separate from the actuating rack for moving the rock-shaft to bring the arm into and out of engagement with the rack, in combination with a locking arm, means for actuating the rack, means for moving the arm into engagement with the numeral wheel, a carrying device, means for moving the carrying device to actuate the wheel, means for moving the numeral wheel away. from the locking arm after it has been moved into an engaging position and means for moving the-locking arm away from such position'after the carrying has been effected.

18. In a machine of the character described, comprising a main shaft, a rock shaft adapted to be oscillated therefrom, a numeral Wheel, an actuating rack therefor and a lock arm rigidly secured to the rock shaft and moving with it, and means for rocking the shaft and lock arm during the last portion of the forward oscillation and the first portion of the rearward oscillation of the main shaft.

19. In a machine of the character described, comprising a main shaft, a rock shaft adapted to be oscillated therefrom, a numeral wheel, an actuating rack therefor and a lock arm rigidly secured to the rock shaft and moving with it, and means for rocking the shaft and lock arm during the last portion of the forward oscillation and the first portion of the rearward oscillation of the nain shaft and keeping it at rest during tne'remainder of the movement of the shaft.

20. In amachine of the character described, comprising a main shaft, a rock shaft adapted to be oscillated therefrom, a numeral wheel, an actuating rack therefor and a lock arm secured to the rock shaft and moving with it, means for rocking the shaft and lock arm during the last portion of the forward oscillation and the first portion of the rearward oscillation of the main shaft, consisting of a lever secured to the rock shaft, a roller lever secured to the shaft and aslot in the rock shaft lever in which the roller moves idly during a portion of its movement.

21. In a machine of the character described, comprising a main shaft, a rock l shaft adapted to be oscillated therefrom, a numeral wheel, an actuating rack therefor and a lock arm secured to the rock shaft and moving with it, means for rocking the shaft and lock arm during the last portion of the forward oscillation and the first portion of the rearward oscillation of the main shaft and keeping it at rest during the remainder of the movement of the shaft, consisting of a crank on the main shaft, a roller mounted on the crank, a lever secured to the rock shaft and adapted to be moved by the roller and a slot in the rock shaft lever.

22. In the machine of the character described, comprising a main shaft, a rock shaft adapted to be oscillated therefrom, a numeral wheel, an actuating'rack therefor and a lock arm secured to the rock shaft and moving with it, means for rocking the shaft and lock arm during the last portion of the forward oscillation and the first portion of the rearward oscillation of the main shaft and keeping it at rest during the remainder of the movement of the shaft, consisting of a crank on the main shaft, a roller mounted on the crank, a lever secured to the rock shaft and adapted to be moved by the roller and a slot in the rock shaft lever coincident with the are of movement of the roller at one end.

Vitness my hand this 23d day of April, 1908, at \Vilkes-Barre, in v the county of Luzerne and State of Pennsylvania.

HENRY KUENlZLER.

Vitnesses:

H. A. GORDON, BERTHA R. WILSON. 

